In Node.js 11.7.0, a bug was introduced that results in the following command:
npm t
Outputting an empty coverage report. In older versions of Node.js, a correct 100% coverage report is output.
The underlying cause appears to be that the registered exit handler in nyc
no longer fires:
onExit(function () {
_this.writeCoverageFile()
}, {alwaysLast: true})☝ mocha has its own exit handler, one hunch is perhaps two exit handlers being run in conjunction no longer works.